Drafting-table.



PATENTED APR. 17, 1906.

G. W. MARTIN.

DRAFTING TABLE.

APPLICATION FILED FEI3.14,1905.

2 SHEETS-SHEET 2.

WITNESSES.-

a OFFIGIE.

GEORGE WILLIAM MARTIN, OF AKRON, OHIO.

DRAFTlNG-TABLE.

Specification of Letters Patent.

Patented April 17, 1906.

Application filed February 14,1905. Serial No. 245,575.

To all whom it may concern:

Be it known that I, GEORGE WILLIAM MAR- TIN, a citizen of the UnitedStates, residing at Akron, in the county of Summit and State of Ohio,have invented certain new and useful Improvements in Drafting-T ables,of which the following is a specification.

My invention relates to improvements in drawing-tables, or, .as they aresometimes called, drafting-tables; and one object of my invention is theprovision of a table of this character which can be instantly adjustedto any desired position, according to the work for which it is to beused, and which can be quickly retained at the desired adjustment.

Another object of my invention is the provision of a drawing or draftingtable which will be instantly capable of any desired adjustment andwhich will be compact in construction and light in weight to permit easyhandling and transportation, which will be the essence and embodiment ofsimplicity, durability, and inexpensiveness of construction, and whichwill be thoroughly efiicient for the desired purposes and entirelypractical in every particular.

To attain the desired objects, my invention consists of a drafting ordrawing table embodying novel features of construction and combinationof parts, substantially as disclosed herein.

In order that the details of construction and the operation of myinvention may be readily understood and its numerous advantages be fullyappreciated, I have shown in the accompanying drawings a drafting-tableembodying my invention.

Figure 1 represents a front elevation of a complete drafting-tableconstructed in accordanoe with my invention. Figs. 2 and 3 representdetail views, on an enlarged scale, of the mechanism for raising andlowering the table or for adjusting it vertically. Fig. 4 represents anend view of the table, showing in dotted lines the table in raised andinclined position. Fig. 5 represents an enlarged sectional view of theclamping and adjusting means, and Fig. 6 represents a sectional view onthe line 2 2 of Fig. 4. Fig. 7 is a detail view of lamp-bracket.

Referring by numerals to the drawings, in which similar numerals ofreference denote corresponding parts in the several views of thedrawings, the numeral 1 designates the platform or table proper, whichat its ends, on the under side and near one edge, is provided with thedepending brackets 2, to which are pivoted the upper ends of the slottedlinks or arms 3, and centrally at each end on the under side of thetable is providedthe pair of depending brackets 4, which are hinged orpivoted to the upper ends of the rectangular sliding bars 5, said barsfitting in the guideboxes 6 and being vertically adjustable in saidboxes. These boxes form the vertical legs or supports of my table andare connected by the horizontal strips 7 and have the supporting-legs 8secured thereto, the whole structure forming the frame of my table andthe end boxes forming the guides and retain- 7o ers for the slidingbars. The slotted arms or links are guided in the channeled sleeves 9and are adjustable on the threaded stems or bolts 10, which carry theadjusting-nut 11 and have the headed portion 12, which is 7 5 seated inone wall of the end boxes and bears upon the clamping-plate 13, whichplate presses against the sliding bar on one side and holds the bar inthe proper adjustments, as well as the slotted arms or links.

In addition to the means just described for holding the slotted linksand the sliding bars in position I employ the binding-plates 14. whichby means of the head 15 on the bolt 16, which is operated by thebinding-nut 17, brings the plates against the opposite face of thesliding bar, and thus the bars are held in the proper position by theheaded bolts on each side, and it is thus impossible for the ta ble toslip or sag, and the proper adjustment is assured under all conditions.

From the foregoing it is evident that the table can be adjustedvertically and secured at any vertical adjustment and may be inclined toany desired angle or pitch and secured at 5 the desired inclination, andfor the purpose of quickly raising and lowering the table I provide anovel mechanism, which I will now roceed to describe.

About the center of the table and from the under side is secured thehanger or bracket 18, to which is connected the upper end of the screw19, said screw being of sufficient length and protected by a tube orjacket 20. Aplate 21 is secured to the upper cross-piece of 10 5 thetable at 22, and upon said plate is formed the stud 23, which forms thebearing for the wheel 24, having on one side the operatinghandle 25, andupon its other face being formed with bevel-gear teeth 26, which on nogage the bevel-gear 27, having the worm portion 28 to engage thevertical screw 19, and

thoroughly eflicient and by the turning of the hand gear-wheel the-bevel-gear is revolved and raises and lowers the vertical screw and inconsequence adjusts the table vertically with ease and rapidity.

From the foregoing description, taken in connection with the drawings,it is evident that I provide a drafting-table which can be instantlyadjusted to any desired position and which will under all conditionsremain in the proper adjustment, which is light in weight, but strongand durable, and which is practical in every particular.

In connection with my drawing-table I use the novel form of bracketshown in Fig. 7, which is attached to the table, as shown, and whichforms a perfect support for a lamp or for the tools used by thedraftsman. It will be observed that this bracket is adjustable toaccommodate the requirements of the user.

I claim 1. In a drafting-table, the combination with a frame, havingvertical hollow standards, of supports slidably adjustable in saidstandards, the table-top carried by said supports, clamping-platesloosely attached to the inner surfaces of said hollow standards, boltsextending through said standards having heads which engage theclamping-plates, and means for drawing upon the bolts to clamp theplates tightly against the sliding supports.

2. In a drafting-table, the combination with a frame, having verticalhollow standards, of supports slidably adjustable in said standards, thetable-top pivoted to said supports, clamping-plates loosely attached tothe inner surfacesof said hollow standards, bolts extending through saidstandards having heads which engage the clamping-plates, and means fordrawing upon the bolts to clamp the plates tightly against the slidingsupports, channeled sleeves mounted to rotate on said bolts and slottedlinks passing through said sleeves and over said bolts, one end of eachof said links being pivoted to the table-top, said. drawing means beingadapted when actuated to operate the clamping-plates to simultaneouslyclamp the links against the sleeves, whereby the top is simultaneouslysecured in both angular and vertical adjustment.

3. In a drafting-table, the combination with a frame, having verticalhollow standards, of supports slid ably adjustable in said standards,the table-top carried by said. supports, spring-metal clamping-platesattached at one end to the inner surfaces of said hollow standards,bolts extending through said standards having heads which engage theclamping-plates at their free ends, and means for drawing upon the boltsto clamp the plates tightly against the sliding supports.

4. In a drafting-table, the combination with a frame, having verticalhollow standards, the supports slidably adjustable in said standards,the table-top carried by said supports, a pair of clamping-platesloosely attached to the opposite inner surfaces of each hollow standard,bolts extending in opposite directions through said standards and havingheads which engage the clamping-plates,

and'means for draw ng the same to clamp the plates tightly against theslid ng supports on opposite sides thereof.

5. In a drafting-table, the combination with a frame, having verticalhollow standards, the supports slidably adjustable in said standards,the table-top carried by said supports, a pair of spring-metalclamping-plates attached at one end to the opposite inner surfaces ofeach hollow standard, bolts extending in opposite directions throughsaid standards and having heads which engage the clamping-plates attheir free end s, and means for drawing the same to clamp the platestightly against the sliding supports on opposite sides thereof.

6. In a drafting-table, the combination with a frame, having verticalhollow standards, the supports slidably adjustable in said standards,the table-top pivoted to said supports, a pair of clamping-platesloosely attached to the opposite inner surfaces of each hollow standard,bolts extending in opposite directions through said standards and havingheads which engage the clamping-plates, and means on each of the boltsfor drawing the same to clamp the plates tightly against the slidingsupports on opposite sides thereof, channeled sleeves mounted. to rotateon a pair of said bolts one on each of said standards opposite eachother, slotted links passing through said sleeves and over said bolts,one end of each of said links being pivoted to the tabletop, saiddrawing means, on the above-mentioned sleeve-carrying bolts, beingadapted, when actuated to operate the clampingplates, to simultaneouslyclamp the links against the sleeves, whereby the top is simultaneouslysecured in both angular and vertical adjustment.

7. In an adjustable standard for a table, a

vertical hollow standard supported from the floor, a support slidinglyadjustable in said standard, a top carried on said supports, a

clamping-plate loosely attached to the inner surface of the hollowstandard, a bolt extending through said standard and having a head whichengages the clamping-plate, and means for drawing upon the bolt to clampthe same tightly against the sliding support.

In testimony whereof I aflix my signature in presence of two witnesses.

GEORGE WILLIAM MARTIN. Witnesses: E. T. MoHN, J. D. RITCHIE IIO

